JSON Viewer
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About JSON Viewer
What does JSON Viewer do?
JSON Viewer with dedicated interactive workflow and modern dark/light UI.
Paste raw or messy JSON and instantly see it in a clean, readable, collapsible tree. This viewer beautifies your data, lets you expand and collapse nodes, and helps you spot structure and errors fast — perfect for developers, testers, and anyone working with APIs. No installs, no signup.
What it does
Parses your JSON and displays it in a formatted, indented tree view so nested objects and arrays are easy to read and navigate.
How to use
- Paste your JSON data into the input box.
- The viewer formats it into a readable tree automatically.
- Expand or collapse nodes and copy the clean output.
Key features
- Beautifies and indents messy JSON instantly
- Collapsible tree view for nested data
- Highlights structure and basic syntax errors
- Free, no signup, works in your browser
When to use it
- Inspecting API responses while developing
- Debugging config or data files
- Making minified JSON readable
Tips for best results
- Paste valid JSON; check for missing commas or brackets if it fails.
- Collapse large arrays to focus on the part you need.
- Copy the formatted output back into your code editor.
Frequently Asked Questions
Does it validate JSON?
Yes — it highlights structure and flags basic syntax errors.
Can it handle large JSON?
Yes, and you can collapse nodes to navigate big files.
Is my data uploaded?
No, JSON is processed in your browser and not stored.
Is it free?
Yes, free with no signup.
Does it work on mobile?
Yes, it works in any browser.
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